Do a google search for stereograms.  It's basically the same principle, except stereograms make people mad that can't do the cross eyed thing because they can't ever see the pictures lol

Here are some Nintendo themed ones since this is a gaming website :P

http://www.gamecubicle.com/specials-stereograms_nintendo.htm

I can't do it. =P

I can do it but it's very blurry. Is that supposed to happen or are my eyes F*cked up.

EDIT: Holy Shit. After practicing I can sharpen my view. You have to cross your eyes to the point where you have 3 images. Then, you focus on the middle image. If you focus, that middle image will sharpen up. It's amazing.

It's blurry to start, then you need to "focus" I find when I focus the images start to move closer together so I blur them past the point where there is just the middle image then start focus

Funny, I can do each one perfectly without much effort.

They're really cool, like Digital 3D.

That can't be good for your eyes lol.

oh my gosh, i did it, it was amazing

It's been a little while since I've done these, I can't do the videos though. It's pretty cool once you get it.

I spent so much time on this thread playing around with the 3D images. It really is brilliant. The only dissapointing thing about this 3D effect is that it doesn't pop from up your computer screen. However it adds depth to the images that look very realistic and very cool.

owww my freaking eyes!